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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPHFS_MIRROR_INSTANCE_WATCHER_H
#define CEPHFS_MIRROR_INSTANCE_WATCHER_H
#include <string_view>
#include "common/ceph_mutex.h"
#include "include/Context.h"
#include "include/rados/librados.hpp"
#include "Watcher.h"
class ContextWQ;
namespace cephfs {
namespace mirror {
// watch directory update notifications via per daemon rados
// object and invoke listener callback.
class InstanceWatcher : public Watcher {
public:
struct Listener {
virtual ~Listener() {
}
virtual void acquire_directory(string_view dir_path) = 0;
virtual void release_directory(string_view dir_path) = 0;
};
static InstanceWatcher *create(librados::IoCtx &ioctx,
Listener &listener, ContextWQ *work_queue) {
return new InstanceWatcher(ioctx, listener, work_queue);
}
InstanceWatcher(librados::IoCtx &ioctx, Listener &listener, ContextWQ *work_queue);
~InstanceWatcher();
void init(Context *on_finish);
void shutdown(Context *on_finish);
void handle_notify(uint64_t notify_id, uint64_t handle,
uint64_t notifier_id, bufferlist& bl) override;
void handle_rewatch_complete(int r) override;
bool is_blocklisted() {
std::scoped_lock locker(m_lock);
return m_blocklisted;
}
bool is_failed() {
std::scoped_lock locker(m_lock);
return m_failed;
}
private:
librados::IoCtx &m_ioctx;
Listener &m_listener;
ContextWQ *m_work_queue;
ceph::mutex m_lock;
Context *m_on_init_finish = nullptr;
Context *m_on_shutdown_finish = nullptr;
bool m_blocklisted = false;
bool m_failed = false;
void create_instance();
void handle_create_instance(int r);
void register_watcher();
void handle_register_watcher(int r);
void remove_instance();
void handle_remove_instance(int r);
void unregister_watcher();
void handle_unregister_watcher(int r);
};
} // namespace mirror
} // namespace cephfs
#endif // CEPHFS_MIRROR_INSTANCE_WATCHER_H
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